Added markdown rendering

static/js/lib/node_modules/preact/src/clone-element.js

@@ -0,0 +1,48 @@
+import { assign, slice } from './util';
+import { createVNode } from './create-element';
+import { UNDEFINED } from './constants';
+
+/**
+ * Clones the given VNode, optionally adding attributes/props and replacing its
+ * children.
+ * @param {import('./internal').VNode} vnode The virtual DOM element to clone
+ * @param {object} props Attributes/props to add when cloning
+ * @param {Array<import('./internal').ComponentChildren>} rest Any additional arguments will be used
+ * as replacement children.
+ * @returns {import('./internal').VNode}
+ */
+export function cloneElement(vnode, props, children) {
+	let normalizedProps = assign({}, vnode.props),
+		key,
+		ref,
+		i;
+
+	let defaultProps;
+
+	if (vnode.type && vnode.type.defaultProps) {
+		defaultProps = vnode.type.defaultProps;
+	}
+
+	for (i in props) {
+		if (i == 'key') key = props[i];
+		else if (i == 'ref') ref = props[i];
+		else if (props[i] === UNDEFINED && defaultProps !== UNDEFINED) {
+			normalizedProps[i] = defaultProps[i];
+		} else {
+			normalizedProps[i] = props[i];
+		}
+	}
+
+	if (arguments.length > 2) {
+		normalizedProps.children =
+			arguments.length > 3 ? slice.call(arguments, 2) : children;
+	}
+
+	return createVNode(
+		vnode.type,
+		normalizedProps,
+		key || vnode.key,
+		ref || vnode.ref,
+		null
+	);
+}